[INFO] cloning repository https://github.com/jxs/tower-error-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jxs/tower-error-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjxs%2Ftower-error-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjxs%2Ftower-error-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bd5bc1826eb3ce2a4d370f23496c7e46de155de0
[INFO] documenting jxs/tower-error-example against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjxs%2Ftower-error-example" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jxs/tower-error-example on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jxs/tower-error-example
[INFO] finished tweaking git repo https://github.com/jxs/tower-error-example
[INFO] tweaked toml for git repo https://github.com/jxs/tower-error-example written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/jxs/tower-error-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c29e28c0688305ee7b0847dc85b9f68bc1c5a9b017d0c1ba22d8877af7c0056d
[INFO] running `Command { std: "docker" "start" "-a" "c29e28c0688305ee7b0847dc85b9f68bc1c5a9b017d0c1ba22d8877af7c0056d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c29e28c0688305ee7b0847dc85b9f68bc1c5a9b017d0c1ba22d8877af7c0056d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c29e28c0688305ee7b0847dc85b9f68bc1c5a9b017d0c1ba22d8877af7c0056d", kill_on_drop: false }`
[INFO] [stdout] c29e28c0688305ee7b0847dc85b9f68bc1c5a9b017d0c1ba22d8877af7c0056d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8bcd76a2903cf1df7299cc815e01e8ce844e7f519ea0b61fd08ab2d5e45fdb5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b8bcd76a2903cf1df7299cc815e01e8ce844e7f519ea0b61fd08ab2d5e45fdb5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]     Checking futures v0.1.26
[INFO] [stderr]    Compiling cc v1.0.35
[INFO] [stderr]    Compiling rustc-demangle v0.1.14
[INFO] [stderr]    Compiling proc-macro2 v0.4.28
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling syn v0.15.32
[INFO] [stderr]    Compiling remove_dir_all v0.5.1
[INFO] [stderr]    Compiling unicode-segmentation v1.2.1
[INFO] [stderr]    Compiling indexmap v1.0.2
[INFO] [stderr]    Compiling multimap v0.4.0
[INFO] [stderr]     Checking crossbeam-utils v0.6.5
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]    Compiling backtrace v0.3.15
[INFO] [stderr]     Checking tokio-trace-core v0.1.0
[INFO] [stderr]    Compiling petgraph v0.4.13
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]     Checking crossbeam-epoch v0.7.1
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling codegen v0.1.1 (https://github.com/carllerche/codegen#87e270f7)
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking num_cpus v1.10.0
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking mio v0.6.16
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]     Checking http v0.1.17
[INFO] [stderr]     Checking parking_lot_core v0.4.0
[INFO] [stderr]     Checking tokio-executor v0.1.7
[INFO] [stderr]     Checking tower-service v0.2.0
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking tokio-sync v0.1.5
[INFO] [stderr]     Checking tokio-buf v0.1.1
[INFO] [stderr]     Checking tower-layer v0.1.0 (https://github.com/tower-rs/tower#d0d6ed54)
[INFO] [stderr]     Checking tower-discover v0.1.0 (https://github.com/tower-rs/tower#d0d6ed54)
[INFO] [stderr]     Checking tower-load-shed v0.1.0 (https://github.com/tower-rs/tower#d0d6ed54)
[INFO] [stderr]     Checking tokio-timer v0.2.10
[INFO] [stderr]     Checking tokio-threadpool v0.1.14
[INFO] [stderr]     Checking tokio-current-thread v0.1.6
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking tower-timeout v0.1.0 (https://github.com/tower-rs/tower#d0d6ed54)
[INFO] [stderr]     Checking tower-retry v0.1.0 (https://github.com/tower-rs/tower#d0d6ed54)
[INFO] [stderr]     Checking tokio-codec v0.1.1
[INFO] [stderr]     Checking tower-util v0.1.0 (https://github.com/tower-rs/tower#d0d6ed54)
[INFO] [stderr]     Checking tokio-connect v0.1.0 (https://github.com/carllerche/tokio-connect#f7ad1ca4)
[INFO] [stderr]     Checking tokio-reactor v0.1.9
[INFO] [stderr]     Checking tower-buffer v0.1.0 (https://github.com/tower-rs/tower#d0d6ed54)
[INFO] [stderr]     Checking tower-limit v0.1.0 (https://github.com/tower-rs/tower#d0d6ed54)
[INFO] [stderr]     Checking tokio-fs v0.1.6
[INFO] [stderr]     Checking tower v0.1.0 (https://github.com/tower-rs/tower#d0d6ed54)
[INFO] [stderr]     Checking tokio-uds v0.2.5
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio-udp v0.1.3
[INFO] [stderr]    Compiling tempfile v3.0.7
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling which v2.0.1
[INFO] [stderr]     Checking tokio v0.1.19
[INFO] [stderr]    Compiling prost-build v0.5.0
[INFO] [stderr]     Checking http-body v0.1.0 (https://github.com/tower-rs/tower-http#e7ef6ef6)
[INFO] [stderr]     Checking h2 v0.1.18
[INFO] [stderr]     Checking tower-request-modifier v0.1.0 (https://github.com/tower-rs/tower-http#e7ef6ef6)
[INFO] [stderr]     Checking tower-http-util v0.1.0 (https://github.com/tower-rs/tower-http#e7ef6ef6)
[INFO] [stderr]     Checking tower-http v0.1.0 (https://github.com/tower-rs/tower-http#e7ef6ef6)
[INFO] [stderr]    Compiling prost-derive v0.5.0
[INFO] [stderr]     Checking tower-h2 v0.1.0 (https://github.com/tower-rs/tower-h2#a3c958a2)
[INFO] [stderr]    Compiling prost v0.5.0
[INFO] [stderr]     Checking tower-grpc v0.1.0 (https://github.com/tower-rs/tower-grpc#597f56ce)
[INFO] [stderr]    Compiling prost-types v0.5.0
[INFO] [stderr]    Compiling tower-grpc-build v0.1.0 (https://github.com/tower-rs/tower-grpc#597f56ce)
[INFO] [stderr]    Compiling tower-error-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting tower-error-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 07s
[INFO] running `Command { std: "docker" "inspect" "b8bcd76a2903cf1df7299cc815e01e8ce844e7f519ea0b61fd08ab2d5e45fdb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8bcd76a2903cf1df7299cc815e01e8ce844e7f519ea0b61fd08ab2d5e45fdb5", kill_on_drop: false }`
[INFO] [stdout] b8bcd76a2903cf1df7299cc815e01e8ce844e7f519ea0b61fd08ab2d5e45fdb5